Dynamic explosion test loading structure and charging dynamic explosion loading rocket sled test system

By using rocket sled platform to load the medicine ball in the dynamic explosion test and the medicine ball is dissipated and separated by cutting cables, the problems of overload and high chamber temperature in traditional artillery tests are solved, and more accurate characterization of shock wave distribution rules and High consistency test conditions.

CN119492286APending Publication Date: 2025-02-21CHINA NAT INST OF TEST & TESTING
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Patent Information

Application Number
CN202411580669.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-07
Publication Date
2025-02-21

AI Technical Summary

Technical Problem

In the existing dynamic explosion test methods, the gunfire test has problems with overload and high chamber temperature, resulting in the design of a thicker shell in the charging structure, which affects the true characterization of the shock wave distribution law.

Method used

Using the loading and explosive loading test method based on rocket sled, the loading and explosive loading rocket sled test system is designed, and the medicine ball is loaded to a predetermined speed using the rocket sled platform, and the medicine ball throwing is completed by cutting the cable. Release and separate to achieve fixed-point detonation of the medicine ball and obtain shock wave overpressure test data.

Benefits of technology

It achieves a more accurate representation of the true shock wave distribution law when the dynamic explosion charge is detonated, provides high consistency and reproducible test conditions, and overcomes the shortcomings of traditional artillery firing tests.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a dynamic explosion test loading structure and a charge dynamic explosion loading rocket sled test system, and mainly solves the problem that real shock wave data cannot be accurately obtained in a gun firing test during charge detonation of dynamic explosion. The dynamic explosion test loading structure comprises a seat body and a sealing cap, the medicine ball is arranged in a groove in the top surface of the seat body; the dynamic explosion test loading structure is arranged on a rocket sled platform, the explosive ball is loaded to a preset speed through the rocket sled, the explosive ball is separated from the rocket sled, the explosive ball reaches a preset explosion point above a shock wave characteristic parameter test area, and the explosive ball is detonated by the detonating device. A sensor and a high-speed camera are arranged in a test area, explosive ball explosion moment information and shock wave field evolution process images and displacement parameters are obtained, and therefore accurate experiment information is obtained; the method has the advantages of being controllable in test state, high in universality, good in repeatability, convenient to test and the like, and a reliable test method is provided for charge detonation.
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Description

Technical Field

[0001] The invention belongs to the technical field of warhead power evaluation and weapon damage effectiveness assessment, and mainly relates to a charge dynamic explosion test method based on a rocket sled test platform. Background Art

[0002] Modern weapons, from standard artillery to missiles incorporating advanced technologies, often have warheads traveling at speeds exceeding the speed of sound. The effects of a warhead exploding at high speeds are unique compared to those produced by a static warhead detonation. Therefore, studying the shockwave characteristics of a warhead exploding under dynamic conditions is crucial for evaluating warhead power, assessing weapon damage effectiveness, and designing dynamic explosion test protocols.

[0003] Most formulas for calculating static explosion overpressure are based on the self-detonation similarity law, modified by empirical formulas fitted from multiple sets of measured data. Well-known empirical formulas include the Herych formula and the Sadovsky formula. Regarding kinetic explosion overpressure calculation models, existing kinetic explosion theories generally use the equivalent charge method to treat moving charges. Based on the principle of energy similarity, the increase in power caused by a moving TNT charge can be equated with an increase in the charge mass of a stationary TNT charge. Combining the equivalent charge formula with the aforementioned empirical formula for static explosion overpressure yields the corresponding kinetic explosion overpressure calculation formula. To further investigate the distribution of charge kinetic explosion shock waves and establish a computational model for kinetic explosion test engineering, it is necessary to study the influence of charge velocity on the evolution of the explosion shock wave flow field and analyze the characteristics of the kinetic explosion shock wave, such as the shock wave overpressure, the duration of the positive pressure, and the specific impulse.

[0004] Research on the test method of kinetic explosive loading is of great significance to the study of the distribution law of kinetic explosive shock wave. At present, conventional kinetic explosive tests are mainly carried out through gun firing tests, but a large overload will be generated during the firing process, and the temperature in the barrel is high. When using this test method, a thicker shell needs to be designed on the outside of the kinetic explosive test charge structure to prevent the medicine ball from exploding in the barrel of the gun. However, if the shell of the charge structure is too thick, it will have a greater impact on the kinetic explosive shock wave, resulting in the test data being unable to fully characterize the actual shock wave distribution law when the kinetic explosive charge is detonated. Therefore, it is necessary to study a new test method for kinetic explosive loading of charges.

[0005] The rocket sled test can simulate the speed and acceleration requirements of various missiles, aircraft, and other products. Its high controllability of speed and attitude, good repeatability, and ease of testing make it an ideal method for dynamic explosive loading tests. Research on rocket sled-based dynamic explosive loading test methods is of great significance for studying the distribution of dynamic explosive shock waves. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art and more accurately characterize the actual shock wave distribution law when a kinetic explosive charge is detonated, the present invention provides a kinetic explosive test loading structure and a charge kinetic explosive loading rocket sled test system.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A dynamic explosion test loading structure includes a base body and a sealing cap; the base body is a cylinder; a first flange is provided on the circumference of the bottom surface of the base body; a second flange is provided on the circumference of the top surface of the base body; a groove is provided on the top surface of the base body; the cross-section of the groove is semicircular; a sealing cap is provided on the top surface of the base body; the sealing cap is a hollow hemisphere; the radius of the sealing cap is the same as the radius of the groove; a third flange is provided at the bottom end of the sealing cap arc; the sealing cap is fixedly connected to the second flange of the base body through the third flange; a through hole is provided on the outer wall of the base body; and a plurality of arc-shaped grooves are provided on the spherical surface of the sealing cap.

[0009] Furthermore, the projected area of ​​the through hole is larger than the projected area of ​​the medicine ball; and the through hole is located above the medicine ball.

[0010] Furthermore, a cutting rope is provided in the arc-shaped groove.

[0011] Furthermore, an annular groove is provided at the bottom end of the arc of the sealing cap along the circumferential direction; and a cutting rope is provided in the annular groove.

[0012] Furthermore, a buffer material is provided at the bottom of the groove; the buffer material is provided in the gap reserved between the medicine ball and the seat body; the buffer material prevents the medicine ball from being stuck in the mounting seat body and unable to escape after the sealing cap opens and separates; the buffer material is a foam material.

[0013] Furthermore, a detonator is provided at the top of the arc of the sealing cap.

[0014] Furthermore, a lug is provided on the top surface of the third flange; and an electric detonator is provided on the lug.

[0015] Furthermore, the material of the sealing cap is aluminum.

[0016] A charged kinetic explosive loading rocket sled test system using a kinetic explosive test loading structure comprises a kinetic explosive test loading structure, a test sled platform, a straight track, a separation device and a test area; the kinetic explosive test loading structure is arranged at the front end of the test sled platform in the forward direction; the angle between the base of the kinetic explosive test loading structure and the test sled platform is 60 degrees; the separation device comprises a power-on device, a short arc track and a collision interception device; a power-on device is arranged on the straight track; a short arc track is arranged at the end of the straight track; a collision interception device is arranged at the end of the short arc track; the test area comprises a preset detonation point, a high-speed camera trigger target, a wall pressure sensor, a laser high-speed camera, a free-field pressure sensor, a first high-speed camera and a second high-speed camera; the wall pressure sensor is arranged on the flight trajectory of the medicine ball one side of the medicine ball flight trajectory; the free-field pressure sensor is arranged on the other side of the medicine ball flight trajectory; the wall pressure sensor and the free-field pressure sensor are evenly distributed with the preset detonation point as the center; the laser high-speed camera and the first high-speed camera are respectively arranged on both sides of the medicine ball flight trajectory; the line connecting the laser high-speed camera and the first high-speed camera setting point passes through the preset detonation point, and the line connecting the laser high-speed camera and the first high-speed camera setting point is perpendicular to the medicine ball flight trajectory; the second high-speed camera is arranged on the extension line of the medicine ball flight trajectory, and the line connecting the second high-speed camera and the preset detonation point is perpendicular to the line connecting the laser high-speed camera and the first high-speed camera setting point; a high-speed camera trigger target is arranged on the side of the collision interception device close to the test area; the high-speed camera trigger target is connected to the laser high-speed camera.

[0017] Furthermore, the test skid platform is provided with a resistance plate.

[0018] The beneficial effects of the present invention are:

[0019] 1. Compared to traditional artillery firing tests, the present invention uses a rocket sled to conduct charge kinetic explosion tests, which offers advantages such as state controllability, strong versatility, good repeatability, and convenient testing. It can also provide highly consistent and reproducible test conditions, providing a reliable test method for charge kinetic explosions.

[0020] 2. Compared with traditional artillery firing tests, a dynamic explosion test method has been formed with ballistic control, test object installation base design, cutting rope structure design and test integration technologies as the core. It has the advantages of strong controllability of test trajectory, good repeatability and convenient testing.

[0021] 3. Compared with conventional rocket sled tests, the innovative short arc track separation device shortens the distance of the medicine ball's free flight after separation and improves the accuracy of explosion point control. In addition, the short arc track also has the advantages of easy installation, cost savings, and improved test preparation efficiency.

[0022] 4. The dynamic explosion test loading structure is made of ordinary materials, is easy to process, and has low cost, and can be widely used in dynamic explosion tests of explosives. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the test platform for the explosive kinetic explosive loading rocket sled of the present invention;

[0024] Figure 2 This is a schematic diagram of the loading structure of the dynamic explosion test;

[0025] Figure 3 Schematic diagram of the separation device of the present invention;

[0026] Figure 4 This is a schematic diagram of the layout of the test field of the present invention;

[0027] Among them: 1—test article mounting base; 2—test sled; 3—sealing cap; 4—base; 5—power supply device; 6—short arc rail; 7—collision interception device; 8—earth pile; 9—track supporting beam; 10—high-speed camera trigger target; 11—wall pressure sensor; 12—laser high-speed camera; 13—free-field pressure sensor; 14—high-speed camera. DETAILED DESCRIPTION

[0028] The scheme adopted in the present invention is:

[0029] A dynamic explosion test loading structure, comprising a seat body and a sealing cap; the seat body is a cylinder; a first flange is provided on the circumference of the bottom surface of the seat body; a second flange is provided on the circumference of the top surface of the seat body; a groove is provided on the top surface of the seat body; the cross section of the groove is semicircular; a sealing cap is provided on the top surface of the seat body; the sealing cap is a hollow hemisphere; the radius of the sealing cap is the same as the radius of the groove; a third flange is provided on the bottom end of the sealing cap arc; the sealing cap is fixedly connected to the second flange of the seat body through the third flange; a through hole is provided on the outer wall of the seat body; a plurality of arc-shaped grooves are provided on the spherical surface of the sealing cap; an annular groove is provided on the bottom end of the sealing cap arc along the circumferential direction; during testing, a medicine ball to be tested is placed in the groove;

[0030] The projected area of ​​the through hole is larger than the projected area of ​​the medicine ball; the through hole is located above the medicine ball so that it will not be stuck by the seat during detonation, thereby preventing it from being unable to detach;

[0031] A cutting rope is arranged in the arc-shaped groove; a cutting rope is arranged in the annular groove;

[0032] A buffer material is provided at the bottom of the groove; the buffer material is provided in a gap reserved between the medicine ball and the seat body; the buffer material prevents the medicine ball from being stuck in the mounting seat body and unable to escape after the sealing cap is opened and separated; the buffer material is a foam material;

[0033] A detonator is provided at the top of the arc of the sealing cap; a radial lug is provided on the top surface of the third flange; an electric detonator is provided on the lug; the detonator ensures that the sealing cap is effectively cut and quickly opens and separates under the action of aerodynamic force, thereby reducing the impact on the release and free flight of the medicine ball;

[0034] The material of the sealing cap is aluminum;

[0035] A charge kinetic explosive loading rocket sled test system using a kinetic explosive test loading structure includes a kinetic explosive test loading structure, a test sled platform, a straight track, a separation device, and a test area; the kinetic explosive test loading structure is disposed at the front end of the test sled platform in the forward direction; the angle between the base of the kinetic explosive test loading structure and the test sled platform is 60 degrees;

[0036] The separation device includes a power supply device, a short arc rail and a collision interception device; the power supply device is provided on the straight track of the test sled; a short arc rail is provided at the end of the straight track; and a collision interception device is provided at the end of the short arc rail;

[0037] The test area includes a preset detonation point, a high-speed camera trigger target, a wall pressure sensor, a laser high-speed camera, a free-field pressure sensor, a first high-speed camera and a second high-speed camera; the wall pressure sensor is arranged on one side of the medicine ball flight trajectory; the free-field pressure sensor is arranged on the other side of the medicine ball flight trajectory; the wall pressure sensor and the free-field pressure sensor are evenly distributed with the preset detonation point as the center; the laser high-speed camera and the first high-speed camera are respectively arranged on both sides of the medicine ball flight trajectory; the line connecting the setting points of the laser high-speed camera and the first high-speed camera passes through the preset detonation point, and the laser high-speed camera is set at the same time. The line connecting the optical high-speed camera and the setting point of the first high-speed camera is perpendicular to the flight trajectory of the medicine ball; the second high-speed camera is set on the extension line of the flight trajectory of the medicine ball, and the line connecting the second high-speed camera and the preset detonation point is perpendicular to the line connecting the laser high-speed camera and the setting point of the first high-speed camera; a high-speed camera trigger target is set on the side of the collision interception device close to the test area; the high-speed camera trigger target is connected to the laser high-speed camera; when the collision interception device is activated, the collision interception device triggers the high-speed camera trigger target through an electrical signal, and the high-speed camera trigger target sends a signal to the laser high-speed camera, starting the laser high-speed camera to record;

[0038] The test sled platform is provided with a resistance plate; the resistance plate facilitates fixing the mounting base and provides aerodynamic resistance at the same time to achieve precise control of the test trajectory; the aerodynamic resistance provided by the resistance plate increases the deceleration overload of the rocket sled system, facilitates the distance between the medicine ball and the rocket sled in heading after separation, and reduces the interference of the rocket sled on the free flight of the medicine ball.

[0039] The present invention is described in detail below:

[0040] The purpose of this invention is to propose a method for kinetic explosive loading tests based on a rocket sled test platform. Through systematic design and analysis, a rocket sled test platform suitable for kinetic explosive loading was constructed. The rocket sled platform is used to load a charge ball to a predetermined velocity, which is then released and separated using a cutting cable. This allows for targeted detonation of the ball and acquisition of shock wave overpressure test data. This kinetic explosive test method, centered on trajectory control, test object mounting base design, cutting cable structure design, and experimental and test integration, provides support for research into the distribution of shock waves from kinetic explosive charges.

[0041] Launched from a rocket sled, the booster engine propels the medicine ball to a predetermined velocity. The ball then separates from the sled and flies horizontally for a distance. Once its trajectory stabilizes, it reaches a predetermined detonation point above the shock wave characteristic parameter test area, where it is detonated by a detonator. Pressure sensors and sensors are arranged in a rectangular array within the test area to capture the shock wave incident and reflected pressure parameters under dynamic explosion conditions. Two high-speed cameras are orthogonally positioned relative to the horizontal plane of the medicine ball's trajectory, while a high-speed laser camera is positioned relative to the predetermined detonation point to capture the coordinates of the medicine ball at the moment of detonation, as well as images of the shock wave field evolution and overall displacement parameters.

[0042] The following steps are involved:

[0043] (1) Design a mounting base for the medicine ball for dynamic explosive test. The mounting base consists of a base body and a sealing cap. The base body is a cylindrical structure, and the interior is hollowed out into a hemisphere for placing the medicine ball and filling it with cushioning material. A 15° notch is cut on the top of the cylindrical base body. The sealing cap is a sphere with the same radius and is made of aluminum with a lower density. Axial and radial grooves are engraved on the sealing cap for pre-embedded cutting ropes. The medicine ball is installed in the spherical structure of the base and wrapped with cushioning material.

[0044] (2) Based on the research on the index requirements for test speed and the overload requirements for the safety of the medicine ball and fuze during the test acceleration process, a rocket sled test platform that meets different speed and overload requirements is designed. A resistance plate is designed at the front end of the rocket sled test platform. The size and installation angle of the resistance plate are obtained through multiple aerodynamic simulation iterations and optimized. Its main functions are realized by combining the power system configuration and separation system design.

[0045] (3) Carry out the adaptation of the auxiliary propulsion force and ballistic design of the rocket sled, optimize the power system according to the mass, external dimensions, acceleration overload control requirements of the medicine balls and fuzes of the different test powder balls in the explosive kinetic test, and form a power system that meets the requirements of different speeds and acceleration overloads, so as to achieve the goal of reliably loading the medicine balls to the predetermined speed.

[0046] (4) Design the separation system, optimize the arc angle and length of the separation arc of the sled to meet the requirement of separating the medicine ball and the rocket sled in the longitudinal direction, and combine with the collision interception device to achieve the goal of separating the medicine ball and the rocket sled in the heading direction. Determine the flight distance of the medicine ball after the separation of the sled based on the arc length and the scope of the test equipment layout. Combined with the speed control accuracy of the sled separation point, obtain the separation time, provide input for the fuze delay, and ensure that the medicine ball detonates at the predetermined explosion point.

[0047] (5) Select appropriate cutting rope and electric detonator. The cutting rope is embedded in the groove of the sealing cap. The detonator is fixed on the top of the sealing cap and the predetermined position in the circumference. At the end of the track, the power-on device is used to detonate the cutting rope, cutting the sealing cap into four petals. The sealing cap disintegrates and releases the medicine ball. The fuze starts timing. When the predetermined delay time is reached, the fuze is activated and the test medicine ball is detonated.

[0048] (6) The inner wall of the mounting base is evenly filled with 8mm to 10mm thick cushioning material. The test medicine ball with the fuze is placed in the center of the mounting base and wrapped with the cushioning material. The fuze is installed in the center of the medicine ball and is located directly behind the course. The mounting base is fixed to the front end of the rocket sled. The fuze power supply battery is installed on the leeward side of the mounting base. The booster engine is installed behind the rocket sled.

[0049] (7) Before the test, ground test equipment is deployed, mainly including pressure sensors (for measuring wall pressure and free field pressure), laser high-speed cameras, high-speed photography and other test equipment.

[0050] (8) After the test conditions are met, the rocket engine is ignited, the rocket sled is ignited and launched, and when it reaches the predetermined speed, the ground power supply device provides an electrical signal to the electric initiator, the cutting rope acts, the sealing cap opens and the medicine ball is released, the medicine ball flies freely and detonates at the set explosion point, and the rocket sled slides along the arc track and hits the collision interception device;

[0051] (9) Collect and obtain shock wave pressure data and high-speed video test data.

[0052] The present invention is also implemented in that: in step (1), in order to prevent the medicine ball from being stuck in the mounting base and unable to escape after the sealing cap opens and separates, a gap must be reserved between the medicine ball and the mounting base, and a buffer material must be filled in the gap. The buffer material filled between the medicine ball and the mounting base must be a lightweight, elastic, compressible foam material that is easy to fly away and separate under the action of aerodynamic force.

[0053] The present invention is also implemented in that: in step (1), in order to ensure that the medicine ball separation process is not interfered with by the mounting base, the mounting base is installed at an angle of 60° to the horizontal plane, and at the same time, the upper part of the cylindrical seat is cut 15° to avoid the position directly above the medicine ball, thereby achieving interference-free separation across the arc track.

[0054] The present invention is also achieved by: in step (1), the sealing cap is made of aluminum material with low density and light weight, axial and radial grooves are engraved on the sealing cap to embed cutting ropes, and point detonators are respectively installed on the sealing cap head and the half-cover joint surface to ensure that the sealing cap is effectively cut into four petals, which are quickly opened and separated under the action of aerodynamic force, thereby reducing the impact on the release and free flight of the medicine ball.

[0055] The present invention is also achieved by: in step (2), a large resistance plate is designed at the front end of the rocket sled test platform, which, on the one hand, facilitates the fixing of the mounting base, and on the other hand, provides greater aerodynamic resistance, which is reasonably matched with the engine power to achieve precise control of the test trajectory. In addition, the greater aerodynamic resistance provided by the resistance plate increases the deceleration overload of the rocket sled system, making it easier for the medicine ball and the rocket sled to distance themselves in the heading after separation, thereby reducing the interference of the rocket sled on the free flight of the medicine ball.

[0056] The present invention is also achieved by: in step (4), an innovative short arc track separation device is designed to shorten the free flight distance of the medicine ball after separation, thereby improving the control accuracy of the explosion point. In addition, the short arc track has the advantages of being easy to install and requiring less large-scale mechanical equipment, which can greatly save the installation time of the arc track, save test preparation costs, and improve the test preparation efficiency.

[0057] The present invention is also implemented in that: the shock wave pressure test is divided into wall shock wave pressure measurement and free field pressure measurement. In order to better obtain the characteristic parameters of the dynamic explosion shock wave, the test area is an open area of ​​not less than 25m×25m, and the wall pressure measurement points and free field pressure measurement points each cover half of the area. When the test equipment is laid out, avoid mutual obstruction.

[0058] The present invention is further implemented by using optical measurement to test the shock wave evolution process, with parameters acquired by a high-speed laser camera for capturing images of the shock wave propagation process after the medicine ball explodes. A high-energy YAG sequential pulse laser is used as the illumination source, and a synchronous controller controls the exposure time of a digital high-speed camera, while a narrowband filter system is used to capture dynamic images. The present invention is further described in detail below with reference to the accompanying drawings:

[0059] In a certain kinetic explosive rocket sled test, the specific implementation method of the kinetic explosive loading test of the test ball is as follows:

[0060] Step 1: Select the rocket sled type and booster engine according to the test requirements.

[0061] Step 2: Design the mounting base structure of the medicine ball according to the external dimensions of the medicine ball. Figure 2 The specific requirements are:

[0062] a) Design the seat structure based on the mass, dimensions, and separation requirements of the test ball, and determine the connection method with the test platform.

[0063] b) Carry out the capping structure design, determine the cutting rope layout method, and select appropriate cutting ropes, electric blasters and accessories.

[0064] Step 3: Carry out integrated design of the rocket sled test platform.

[0065] a) The design of the rocket sled must undergo rigidity and strength calculations and simulation analysis, and the results should ensure the safety of the rocket sled's operation;

[0066] b) The separation system design requires an analysis of the dynamic response of the arc trajectory to ensure that the rocket sled and the test ball are longitudinally separated during the arc trajectory separation process;

[0067] c) The interface design between the rocket sled and the test medicine ball mounting base should ensure that it can withstand the mechanical environment during the operation of the rocket sled;

[0068] d) Make reasonable aerodynamic layout of the rocket sled test platform to meet the test trajectory design requirements.

[0069] Step 4 Install the test product, skid-mounted equipment and engine before the test.

[0070] Step 5: Install and deploy the ground test equipment according to the test site layout diagram.

[0071] Step 6: After the test conditions are met, the rocket engine is ignited, the rocket sled is ignited and launched, and when it reaches the predetermined speed, a starting signal is provided to the cutting cable through the ground power grid. The cutting cable opens the sealing cap and releases the medicine ball. The medicine ball flies freely and detonates at the set explosion point. The rocket sled slides along the arc track and hits the collision interception device.

[0072] Step 7: Read the data from the test device.

[0073] This method utilizes a rocket sled as a test platform for kinetic explosive loading. The test pellets are loaded to a predetermined velocity using the rocket sled platform. The pellets are then released and separated by cutting cables, achieving pinpoint detonation. This method captures the detonation coordinates, shock wave pressure data, and image data of the shock wave evolution process. This test method offers advantages such as strong test trajectory controllability, good repeatability, and convenient testing. It also creates highly consistent and reproducible conditions, providing a reliable experimental method for studying the distribution patterns of shock waves from kinetic explosive charges.

Claims

1. A dynamic explosion test loading structure, characterized in that: It includes a seat body and a sealing cap; the seat body is a cylinder; a first flange is arranged on the circumference of the bottom surface of the seat body; a second flange is arranged on the circumference of the top surface of the seat body; a groove is arranged on the top surface of the seat body; the cross-section of the groove is semicircular; a sealing cap is arranged on the top surface of the seat body; the sealing cap is a hollow hemisphere; the radius of the sealing cap is the same as the radius of the groove; a third flange is arranged at the bottom end of the arc of the sealing cap; the sealing cap is fixedly connected to the second flange of the seat body through the third flange; a through hole is arranged on the outer wall of the seat body; and a plurality of arc-shaped grooves are arranged on the spherical surface of the sealing cap.

2. A dynamic explosion test loading structure according to claim 1, characterized in that: The through hole is located above the medicine ball; the projection area of ​​the through hole is larger than the projection area of ​​the medicine ball.

3. A dynamic explosion test loading structure according to claim 1, characterized in that: A cutting rope is arranged in the arc-shaped groove; an annular groove is arranged at the bottom end of the arc of the sealing cap along the circumferential direction; and a cutting rope is arranged in the annular groove.

4. A dynamic explosion test loading structure according to claim 1, characterized in that: A buffer material is arranged at the bottom of the groove; the buffer material is arranged in a gap reserved between the medicine ball and the seat body; the buffer material prevents the medicine ball from being stuck in the mounting seat body and unable to escape after the sealing cap is opened and separated; the buffer material is a foam material.

5. A dynamic explosion test loading structure according to claim 1, characterized in that: A detonator is arranged at the top of the arc of the sealing cap; a lug is arranged on the top surface of the third flange; and an electric detonator is arranged on the lug.

6. A dynamic explosion test loading structure according to claim 1, characterized in that: The sealing cap is made of aluminum.

7. A rocket sled test system using any one of the dynamic explosion test loading structures of claims 1 to 6, characterized in that: It includes a dynamic explosion test loading structure, a test sled platform, a straight track, a separation device and a test area; the dynamic explosion test loading structure is arranged at the front end of the test sled platform in the forward direction; the angle between the base of the dynamic explosion test loading structure and the test sled platform is 60 degrees; the separation device includes a power-on device, a short arc track and a collision interception device; the power-on device is arranged on the straight track; a short arc track is arranged at the end of the straight track; a collision interception device is arranged at the end of the short arc track; the test area includes a preset detonation point, a high-speed camera trigger target, a wall pressure sensor, a laser high-speed camera, a free-field pressure sensor, a first high-speed camera and a second high-speed camera; the wall pressure sensor is arranged on one side of the medicine ball flight trajectory; the free-field pressure sensor It is arranged on the other side of the medicine ball flight trajectory; the wall pressure sensor and the free field pressure sensor are evenly distributed with the preset detonation point as the center; the laser high-speed camera and the first high-speed camera are respectively arranged on both sides of the medicine ball flight trajectory; the line connecting the laser high-speed camera and the first high-speed camera setting point passes through the preset detonation point, and the line connecting the laser high-speed camera and the first high-speed camera setting point is perpendicular to the medicine ball flight trajectory; the second high-speed camera is arranged on the extension line of the medicine ball flight trajectory, and the line connecting the second high-speed camera and the preset detonation point is perpendicular to the line connecting the laser high-speed camera and the first high-speed camera setting point; a high-speed camera trigger target is arranged on the side of the collision interception device close to the test area; the high-speed camera trigger target is connected to the laser high-speed camera.

8. The charge dynamic explosion loading rocket sled test system according to claim 7, characterized in that: The test sled platform is provided with a resistance plate.